Vehicle brake mechanism



Nrs-vf.. ll, 1928.

H. PERROT 'Y VEHICLE BRAKE MECHANISM 3 Sheots--Shqet l Filed oop. v,1924 f ...Muanu mom/Er A.

my me, f 1,691,584

- H.r PERROT l VEHICLE BRAKE MECHANI SM Filed oct. 7 1924 L 5sheets-sheet 2 .Num i3, 1928. 1,691,584

H. PERROT v VEHICLE BRAKE' MECHANISM Filed Oct` '7, 19424 5 Sheets-Sheet3 /N VEN TOR f/E/VR/ Pizco?,

sr @Z f@ Afro/avmv Patented Nov. 13, 1.928.

' UNITED s'rA TES PATENT/ OFFICE HENRI rnnno'r, or PAnIs, Enanos,AssIGNon'To nnNDIX'conronAfrIoN, or CHICAGO,

. ILLIItoIs,I A conronA'rIoN or ILLINOIS.

@VEHICLE BRAKE nncnamsm.

i Application led October 7, 1'924, Serial No. 742,156, and in FranceMay 23, 1924.

This invention relates to the design of vehicle wheel brakes and isespecially adapted for use in connection with rontwwheels.' As shown inthe drawings forming apart of' this specification,- the brakes are ofthe internal type, which for a number of reasons are preferred by manydesigners and "users, but the mounting of such brakes and the method ofactuating the same involves a great deal of study. In the appllcation ofinternal brakes it has .been the standard practice' in the past toanchor the brake shoes at one end" and to act between the-opposite endswith some sort of a cam devlce, which serves to spread the brake shoesapart Ainto contactfwithfthe wheel drum. In my' present invention,'lprovide a' positive connection or linkage between the operatmg memberand at least one of the brake shoes and 'invorder to best illustrate theapplication of my inventioml. have chosen to show thev details relatingthereto as applied to a Seli-energizing or servo brake'c'omprising aplurality of articulated shoes, one end of the shoe combination beingrelatlvely fixed, -while the free end of the combination is connectedthrough the L"positive linkage to the operating member.

It is, therefore, one of the objects of my invention to provide such apositive linkage a as has been referred to. Another object of myinvention is to provide an easy anddirect adjustment 'of the brakeshoes, 4which adjusting means is read- Aily accessible' from theexterior of the drum.

Another object of my invention is to provide a releasing'means for thebrake shoes so positioned vasA tol prevent tlie rattling of the shoes intheir -normal or retracted position. j

These and other objects will beclearly lunderstood after ar study of thespecification taken in connection with the drawings,

wherein:

Figure 1 is a art sectional view through a front Wheel ,s lowing 'theWheel Support and the brake control mechanism.

Figure 2 is an 'eleyation of the brakes within thedrum.

FigureV S is a sectional view 3/3 of Fig. 2; While Figures 4'and 5 aredifferent detail views, partly in section, ci the adjusting device.

ln the drawings, 1 is a wheel spindle hav- '742,157, filed oct.

i-ng anintegral plate 2 With bosses 8 and 4 thereon. Between the bossesSand 4 is positioned the end of an axle 18 through which the pivot orking pin 21 passes. The ends of the king pin being .supported inbushings 19 and 2l), carried in the bosses' 4 and 3 respectively. The'king pin is held in position 'in the end of the axle by the threadedlubri- .cant member 2S. The details of this construction are more fullydescribed and claimed .in my copendinv application, Serial No.' 7',1924.

The 'spindle 1 carries a wheel enerally referred to as 5 and. issupported on the spindle 1 by the bearings 6 and 8. The plate 2 extendsupward l'from the spindle andl on '9 and 10 carry any suitable brakematerial 34, which is adapted to engage the drum 33.

The free end of the' primary brake shoe 9 is slotted or has a part witha slot 48 therein. Positioned -in this slot is a box-like container 36,Within which is housed the principal part of the brake adjustingmechanism, which comprises two gear wheels 37 and 45, the 4shaftior gear45 having an operating means 46 connected thereto, whereby the gear 45and consequently the gear 37 may be turned by removing the cap 47v fromthe drum' cover plate 35. Threaded into the gear? are two members 38 and39. The member 38 is connected by a pin 44, to the brake shoe 9, Whilethe member 39 is connected by va pin 40 to .a

member 17 carried on the end of the operating shaft 12.. The' adjustingmechanismr just described is substantially dust, water and quantityof-lubricant for along time.

The end of the shaft 12 is preferably tinted at 42 in order to get agood grip on the member 17, its position being fixed by a clamping bolt41. The pin 40 is preferably held in position by snap rings'43 lying solIoil tight, yso that it will carry a suiiicient in grooves in the'end ofthe pin 0n either side of member 17. The operating member v12 `isconnected through a universal joint ,illustrated by 13, to which isconnected a ,control rod 14 and a control lever 22. The chassis'endofthe control rod 14 is supported to the side member 24 of the chassis byany satisfactory means/. auch as `a ball slip joint 23. The operatlngshaft 12 is carried in a support 15 held to the plate 2 by nut 16. Anoiling device 52 may f be used to lubricate the joint and bearing forthe member 12. a return springl 32 anchored to it at 3l, the other endof the spring being anchored toa `plate 35 as indicated at 30.r Thesecondary shoe l0 has a spring 27 attached to it at' 26, while the otherend of the spring is anchored either to the cover plate or the/spindleplate as at 29. rOne" of the springs,

preferably 27, is set obliquely to the plane of the brake shoes asclearly indicated in illustrated in the drawing, the cam Ais adapted toengage the surface 51 on the heel l' vof the brake shoe l0. The actual`point of engagement of the cam 50 may be varied considerably even tothetpoint of engaging directly on the pivot itsel but in any event, Iprefer to place this eccentric adustment near the articulated joint.between t e brake shoes. j l

f From 'what has been said'it Ywill be seen that the setting of brakeshoe 9 may be very readily attained through the turnbu'cklearrangementwhich has been described and which is adapted to be adjusted from `theexterior of the drum. This system of ad- 'ustment is very important infront wheel brakes, when operated'through some sort of a uuiiversaljoint as illustrated, whether or not this joint is placed in the axis'of the pivot pin for this arrangement alonemakes it possibie tomaintain the position Lfof the axes o'the universal joint, constant withl reiation to the horizontal plane of the axle;`

it being understood that the original setting has been' one to give-thedesired results. The adjustment is made with' the brakes in the edposition and since the distancebetween the nose of shoe 9 and the pin 40increases as the brake lining wears Aan -adjustment as describedrepositions the brake shoe without disturbing the operatingmember andthe arts of the universal joint when such is used? It will be apparentthat numerous changes may be made in the details of my inventwn withoutdeparting from the spirit of the `same and the scope of the appendedclaims,

lfor example 'while I have shown the operating member 1n connectlon witha universal joint andother `associated .-parts, 1t will be apparent thatthe member may be actuated by means different from that illustrated.

The brake shoe 9 has Having thus described my invention, what.

oneend relatively fixed, an operating mem'f. ber, and a positiveadjustable linkage between said o erating member and the 4other end ofsaid rake.y U

3.111 a brake mechanism, a' drum, an 1nternal brake for engaging saiddrum, having one end relatively fixed, any operating mem ber, and apositive adjustable linkage between/said o erating'member and the otherend of said rake, saidlinkage including a, turnbuckle device adjustablefrom the exterior' vof the rum. y

4. In a bra e mechanism', a drum, an intern-al brake for en aging saiddrum, having oney end relatively ber, and a positive adjustab linkagevbetween said operating member and the other end of said brake,.saidlinkage includingy a turnbuckle device, comprising a. worm aded, anoierating memv just'able from the exterior of the drunir,` and a gearWheel internallyv threadedwith a con-l nector extending from each endthereof, oner A v attached to the end-of the connector bein brake shoean the other ada ted to be nected to said operating mem er.

5. In a brakemechanism, a drum, an

iii

hternal brake for en aging said'drum having one end relatively xed, anoperating member a container movable bodil with the bralre andcarrying'adjusting evices con necting between said operating member andthe other end of said brake.

6.*In a brake mechanism, a drum,y an internal'brake for en aging saiddrum having one end relatively xed, an operating member, a containerositionedl at one end of said brakeand bodi y movable with the brake,said container carryin adjusting devicesl connected between sai oerating member and said other end of the rake.

7. In a brake mechanism, a drum, an in# at onefend of said brake, saidcontainer e carrying .5 adjusting devices connectedv be tween saidoperating member and said other endof the brake.y A

8; In a brake mechanism, a, drum, an'internal brake for engaging'said"df,-um having" one end relatively fixed, an operating mehr` ber,'a box like container positioned in one end of said brake, aid container[carrying an lnternallytlireaded gear and a Worm Wheei m in mesh withsaid gear, threaded members connected to said gea-r andextending withoutthe container, one of said'members being connected to said brake end, amember connected to said operating member and to the other of saidthreaded members andvmeans for turning saidworm and gear for-the purposedescribed.

9. In a brake for engaging said drum, an o erating member and a Worm andgear turn uckle adjisting mechanism connected between the brake andoperatin member and bodily movable in applyin t e brake.

10. In a rake' mechanism, a drum, a brake for engaging said drum, anoperating member, a box like container positioned lon one end of saidbrake and'bodily movable in applying'the-brake, said container carryinga worm and gear includedas a part of a turnbuckle connector adjustingmechanism connected between said operating member and said brake. I y yf y 11. In a brake mechanism, adrmn, a self energizing bralie therefore,comprising at' leasttwo articulated shoes, the Vend' of one beingrelatively 'a positive linkage between said shaft and the end of one ofsaid shoes, and al spring arranged to insure enga` ement with the drumof the shoe linked to the shaitprior to the shoe having the fixed end.

12. In a brake mechanism, a drum, a self energizing brake therefor',comprising at least two articulated shoes, `the end of one beingrelatively tixed, and operating shaft and a said shaft and the end ofone brake shoe, said linkage being' readily adjustable from vtheexterior of said drum.

13. In a-brake mechanism, a drum, an in ternal brake for engaging'saiddrum having one end relatively fixed, an operating menibcr including auniversal joint and means interposed between said operating member andthe other end-of said brake for adjusting y and 'maintaining theposition of the axes of saidv iiniversal joint;

.14. I-n-a brake mechanismJ energizing brake therefor,`, least tWoarticulated shoes, being relatively fixed, an operating member'fornnnying the free end of one oit said shoes and an eccentric.adjusting device adjaa drum, a self comprising at l cent one of thelartic-ula'ted ends oi the shoes for acting on the other of said shoesfor adjusting its position Iwith respect to the drum. Y Y

15.v In a brake mechanism, adrum, a self energizing brake thereior,compi-ming at least two articirlated shoes, the end of one beingrelatively' fixed, an' operating member for moving the free end ot oneosaidshoes and an eccentric adjusting device adjacent one of thearticulated ends'of the shoes for mechanism, a drum, a brakev fixed, anoperating shaft and positive linkage connected between the end of oneAbeing relatively iixed, an operating member for moving the 'free end ofone of said shoes and an eccentric adjusting device adjacent one'of' the.articulated ends of the shoes for acting near the articulated joint foradjusting the position of the joint and `-shoes with l respect to thedrum.

17 In a brake mechanism, a drum, ya self energizing brake therefor.comprising a plurality of articulated shoes, means for rrioving saidshoes .into engagement with the drum and an eccentric adjustingdevice-adjavcent one of the articulated ends of theshoes for acting onsome part of said shoes.

18, i111 a brake mechanism, a drum, a self energizing brake thereforcomprising-articulated primary and secondaryshoes, means for moving saidshoes into engagement with the drum, a release sprin for the primaryshoe, a vrelease sprin for t e secondary shoe, said last mentionsspring1 being 'set obliquelyiwith reference to`t e plane of the brakeshoes to prevent rattling of the brake shoes. i

19. In a brake mechanism, a drum,a self energizing brake thereforcomprising articufor the primary langle ,withlthe plane of vther-brakeshoes toy prevent rattling of said' shoes. l

20. In a brake mechanism, a drum, bralie shoes Within the drum, meansfor causing sald shoes to engage the drum, release sprin s for saidshoes, at least one of said springs set obliquely tothe lane of theshoes to prevent rattling thereo ingengagement with e secondary shoe,

21; In a brake mechanism, a drum, a' self i energizing brake thereforconprising a. plurality of shoes connected by a oat' articulated joint,vmeans for moving said s oes into engagement with the dif/um andan4adjusting device for acting near the articulated jointvfor adjusting theshoe" or shoes with respect to the drum.

'22. A .Wheel support',- corqprising an intehaving' bosses tomakeattachment ot the suppofrt to rom gral spindle and plate, sind platean axle, saidplate extendn upwar i the spindle and having a p urality oforiiices thereimone to receive the braheoperat ing mechanism and:another the brake anchorage, in combinatioliwith a member support- 1ning' throu h its orifice and having a shoulder on one si e of thep1ate,f-and a. nut threaded on'tho member and cooperating with the onsame part of said shoes, l,

the shaft of said mechanism and extendsvhouldr to clamp the member inthe orifice.

23. operating shaft and a plate having an opening through which theshaft passes, in comhination with a'member having a hearing for theshaft sind shouldered on one side of .said plate, and a nut on the otherside of the plate and threaded (mathe member to clamp it to the plate. K10 24. Brake-applying means including an rake-applying means includinganl operating shaft and a p-late having an ing through which the shaftpagses, inl qbm'i; bination with u member having bearingvfor" Intestimony whereof, I aix my'si` ature.

HENRI PER 0T.

shouidered on one sidevof said thesholderd part 5 said member to the

